<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <!--<p>列表书籍</p>
    <ul>
        <li>Java</li>
        <li>C++</li>
        <li>Python</li>
    </ul>-->
    <todo>
        <todo-title slot="todo-title" v-bind:title="title"></todo-title>
        <todo-items slot="todo-items" v-for="(item,index) in todoItems" v-bind:item="item" v-bind:index="index"
        v-on:remove1="removeItems(index)"></todo-items>
    </todo>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.min.js"></script>
<script>
    //插槽
    Vue.component("todo",{
        template:
        /* '<div>' +
                     '<slot></slot>'+
                     '<ul>' +
                       '<slot></slot>'+
                     '</ul>'+
              '<\div>'
         */
            '<div>\
                <slot name="todo-title"></slot>\
                <ul>\
                   <slot name="todo-items"></slot>\
                </ul>\
             </div>'
    });
    Vue.component("todo-title",{
        props:['title'],
        template: '<div>{{title}}</div>'
    });
    Vue.component("todo-items",{
        props:['item','index'],
        template: '<li>{{index}}-->{{item}} <button @click="remove()">删除</button></li>',
        methods: {
            remove: function(index) {
                this.$emit('remove1',index);
            }
        }
    });
    var vm=new Vue({
        el:"#app",
        data:{
            title:"书籍列表",
            todoItems:['Java','Linux','Python']
        },
        methods: {
            removeItems: function (index){
                console.log("删除了"+this.todoItems[index])
                this.todoItems.splice(index,1)//在index的下标后面删除一个元素，也就是当前的元素，若是0则不删除，若是2则删除两个元素
            }
        }
    });
</script>
</body>
</html>